Filters: Contacts: {oldPartyId:70864} (X)
31 results (40ms)|
Filters
Date Range
Extensions Types
Contacts Categories Tag Types Tag Schemes
|
The habitats of the Southeast Atlantic states range from the mountains and uplands in the Blue Ridge and Piedmont areas in the western portion of this region to the Southeastern and Coastal Plains. Fish habitats in the higher elevation regions are typically fast-moving, clear, coldwater streams originating from seeps and springs, while warmwater rivers of the plains carry more organic material and sediment. This diversity of habitats along a very long period of stable geologic activity produces one of the most diverse assemblages of aquatic species in the nation. The Altamaha, Chattahoochee, Flint, Savannah, Catawba, Pee Dee, Broad, and Neuse are major rivers of the region. There are a large number of dams on waterways...
Relative condition of fish habitat in streams of the Eastern Gulf of Mexico States. Histogram shows percentage of total stream length in each condition class.
Map of the risk of current fish habitat degradation of inland streams of the Mid-Atlantic States region.
Thank you to all of the agencies, organizations and individuals that helped make this report happen. We would like to give a special thank you to the following groups and individuals. Web Report Development and Design Jacob Juszak and Don Brown – U.S. Geological Survey Fort Collins Science Center Steven Aulenbach and Sky Bristol - U.S. Geological Survey Core Science Analytics, Synthesis, and Libraries Assessment Contributors Alison Collins - Ocean Associates, Inc. in support of NOAA Fisheries (currently with the Metropolitan Water District of Southern California) Arthur Cooper – Michigan State University Correigh Greene - NOAA Fisheries Northwest Fisheries Science Center Daniel R. Obenour – North Carolina State...
Map of the risk of current fish habitat degradation of inland streams of the Southeast States.
Agouridis, C. T., S. R. Workman, R. C. Warner, and G. D. Jennings. 2005. Livestock grazing management impacts on stream water quality: a review. Journal of the American Water Resources Association 41(3):591-606. Ali, Muna, and T. R. Sreekrishnan. 2001. Aquatic toxicity from pulp and paper mill effluents: a review. Advances in Environmental Research 5(2): 175-196. Allan, J. D. (2004). Landscapes and riverscapes: the influence of land use on stream ecosystems. Annual Review of Ecology, Evolution, and Systematics 35:257-284. Barbier, E.B., S.D. Hacker, C. Kennedy, E.W. Koch, A.C. Stier, and B.R. Silliman. 2011. The value of estuarine and coastal ecosystem services. Ecological Monographs 81:169-193. Beaulieu, J....
Estuaries are the coastal areas where rivers meet the ocean. These areas provide critically important habitat to many fish and shellfish species, and support a variety of important activities (e.g. fishing, shipping, recreation, etc.). These areas, as the transition zone between the land and the sea, are also at high risk for negative effects from human activities including pollution, habitat conversion and loss, and changes to water flows. Understanding how human activities are affecting estuary habitats is important so resource managers can better manage these impacts, and ultimately, sustain estuaries and the fish populations that they support. To analyze estuary condition, a cumulative disturbance index was...
Developing Sub-Indices of Disturbance Variables within each of the four disturbance categories (Land Use/Land Cover, Alteration of River Flows, Sources of Pollution, and Estuary Eutrophication) were combined to create a sub-index of disturbance associated with each category. To calculate the sub-indices, a percent rank was calculated for variable scores in each estuary. Percent rank scores were inverted (i.e. 1-percent rank) where necessary to maintain consistency of interpretation, with low scores representing the highest degree of disturbance. Within each disturbance category, the average of each of the variable percent rank values was calculated. Finally, the percent rank of this average was calculated – this...
While this assessment has found that many of the inland streams were at a low or very low risk of degradation, some fish habitat disturbances, including water diversions, timber harvest practices, and intensity of livestock grazing in watersheds, could not be directly included in this assessment because national datasets of these disturbances and their component variables are unavailable. These disturbances are known to have major, negative effects on fish habitats in this region. Their absence from this assessment, along with absences of other disturbances, has likely produced an overestimation of habitat condition (quality) for some water bodies. These gaps need to be kept in mind while examining the results....
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2015,
PacificCoastRegion,
PacificCoastStates,
RegionalSummary
Map of the risk of current fish habitat degradation of inland streams of the Pacific Coast States.
Assembling Data We used datasets of habitat stressors available at a national scale and measured within estuaries and their associated watersheds. Included datasets represent anthropogenic stressors likely to affect fish habitat within estuaries based on evidence from the published habitat ecology literature. Although many important factors were included, not all data were available at sufficient spatial resolution or geographic breadth for meaningful analysis. Some important datasets that were investigated but determined to be insufficient for inclusion in the current version of the National Estuary Assessment included: historic habitat extent/habitat loss; storm/wastewater discharges; sediment contaminants; biogenic...
While this assessment has found that much of the stream habitat in this region is at low or very low risk of degradation, some key fish habitat disturbances, including water withdrawals or diversions and intensity of livestock grazing in watersheds, could not be directly included in this assessment because national datasets of these disturbances and their supporting variables are unavailable. These disturbances are known to have major, negative effects on fish habitats in this region. Their absence from this assessment, along with absences of other disturbances, has likely produced an overestimation of habitat condition (quality) for some water bodies. Despite such absences, impairment to fish habitats was determined...
NFHP 2015 National Assessment of Fish Habitat Condition Index 2015: Dissolved by Risk Classification
This map service displays a composite view of the National Fish Habitat Partnership's (NFHP) 2015 National Assessment of Fish Habitat Condition Index (HCI) Scores for both streams and estuaries. HCI scores represent current risk of fish habitat degradation due to anthropogenic disturbance factors. Fish habitats with very high risk of habitat degredation are shown in red, high risk in orange, moderate risk in green, low risk in blue and very low risk in purple. For detailed information about the input datasets used to derive this service see the following links: http://assessment.fishhabitat.org/#578a9a43e4b0c1aacab89763/578a99f4e4b0c1aacab89699.
Map of the risk of current fish habitat degradation of inland streams of the Southern Plains States.
Wheat and corn are the two most commonly grown crops in Kansas and Oklahoma and zones with a high risk of habitat degradation in eastern Kansas and Oklahoma correspond to areas of these and other row crops. Texas grew 6.2 million acres of cotton in 2014-15 predominately in the panhandle region, which was projected to be at high risk of fish habitat deterioration. Nutrient runoff from crop fields from all southern plains states not only affects local streams but eventually ends up in estuaries and the Gulf of Mexico. This high-nutrient runoff contributes to a low oxygen dead zone which annually averages over 5,000 square miles in size in the northern Gulf of Mexico and causes fish kills.
Map of the risk of current fish habitat degradation of inland streams of the Northeastern States region.
Oil and gas exploration was not evaluated as a stressor variable in the 2015 assessment, but this practice obviously can affect Gulf habitats. With 45 percent of the nation’s petroleum refining capacity, the Gulf of Mexico is one of the most important regions for oil and gas production in the United States. Offshore oil production in the Gulf of Mexico accounts for 17 percent of total U.S. crude oil production and production is expected to increase in 2017. The federal Bureau of Safety and Environmental Enforcement reported that from 2007 to 2014, an average of ten oil spills releasing more than 50 barrels was reported per year just on the Outer Continental Shelf. Obviously, the worst incident was the Deepwater...
303(d) list - A list established by the Environmental Protection Agency of impaired waters based on total maximum daily loads of pollution under Section 303(d) of the Clean Water Act Alkalinity – the capacity of water to neutralize an acid and higher levels are found in water bodies that are exposed to limestone Anadromous – adult fish live in the sea and return to fresh water to spawn Anchialine pools - unique brackish water environments that form in lava fields near the ocean and are fed by both fresh groundwater and salty seawater Anthropogenic –environmental change caused or influenced by people, either directly or indirectly Ballast water – water carried in the hull of a ship for stability when empty and...
|
|
